HP 71B: Difference between revisions

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== Accessories ==
== Accessories ==
=== Front expansion slots ===
* HP 4K RAM module (HP 82420A)
* CMT RAM modules
* CMT EPROM module
* Various ROM modules by HP and others
=== Rear expansion slot ===
* HP-IL interface (HP 82401A)
* Dual HP-IL interface (HP 82402A)
* Zenwand-71 barcode reader
=== Card reader slot ===
* Magnetic card reader (HP 82400A)
* FRAM71
* HHP 71RAM/EPROM modules
* CMT RAM/EPROM modules


== Gallery ==
== Gallery ==


== External resources ==
== External resources ==
* [https://www.hhcworld.com/files/HP71COMPENDIUM/DOC/HP-71B_COMPENDIUM.pdf HP 71B Compendium (PDF)] - A thorough listing of accessories and software available for the HP 71B


== See also ==
== See also ==

Revision as of 03:52, 26 July 2022


HP 71B
HP 71B.jpg
Other namesHP 44A (during development)
TypePocket computer, scientific calculator
Introduced1983
PredecessorHP 75C/D
SuccessorHP 94, HP 95LX
Cost550 USD
Calculator
Entry modeAlgebraic
Display typeDot-matrix LCD
CPU
ProcessorHP Saturn 1LF2
Frequency640kHz
Programming
Interfaces
Ports4x ROM/RAM slots, 1x card reader/ROM/RAM header, 1x HP-IL/ barcode reader module slots
Other
Power supply4x AAA battery or 8VAC power supply

The HP 71B is a pocket computer and scientific calculator produced by Hewlett Packard.

Features

Internal design

Internally, the HP 71B is divided up into two separate boards with a ribbon cable connecting them. The upper board contains the Saturn microprocessor, keyboard, and display. The lower board contains the power supply hardware, ROM, RAM, and expansion slots.

Programming

By default, the 71B only supports programming in the BASIC language. Additional keywords can be added to BASIC through the use of an expansion ROM module.

Support for Forth can be added through the use of the Forth/Assembler expansion ROM module.

Sample BASIC program

This is a sample program which will play a tone on the buzzer for 0.5 seconds, then increase the frequency non linearly and repeat, while displaying the frequency being played.

10 X=10
20 Y=20
30 PRINT X
40 BEEP X
50 X=X+Y
60 Y=Y+5
70 GOTO 30

Accessories

Front expansion slots

  • HP 4K RAM module (HP 82420A)
  • CMT RAM modules
  • CMT EPROM module
  • Various ROM modules by HP and others

Rear expansion slot

  • HP-IL interface (HP 82401A)
  • Dual HP-IL interface (HP 82402A)
  • Zenwand-71 barcode reader

Card reader slot

  • Magnetic card reader (HP 82400A)
  • FRAM71
  • HHP 71RAM/EPROM modules
  • CMT RAM/EPROM modules

Gallery

External resources

See also